Author Topic: What will happen?  (Read 6135 times)
GE M-400A1
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What will happen? « on: May 15, 2008, 07:56:51 PM » Author: GE M-400A1
What will happen if i screw a mercury vapor, hps, and turn it on?

Will the lamp explode, blacken, or do nothing?

Thanks
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FGS
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Re: What will happen? « Reply #1 on: May 15, 2008, 08:26:49 PM » Author: FGS
Ur not being clear. Do you mean what will happens if you install one of those lamps directly on the mains?

Mercury Vapor - Will explode. Possible the explosion will take the outer bulb with it.
High Pressure Sodium - Likely nothing as it will need a high voltage pulse to start it.
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GE M-400A1
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Re: What will happen? « Reply #2 on: May 15, 2008, 08:40:54 PM » Author: GE M-400A1
Yes connect it to the 120 mains.
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Mr. Big
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Re: What will happen? « Reply #3 on: May 15, 2008, 09:06:05 PM » Author: Mr. Big
Connect ANY discharge lamp to the mains.
Arc strikes, not always but possible
Brighter, brighter BANG! ;D
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icefoglights
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Re: What will happen? « Reply #4 on: May 16, 2008, 12:25:22 AM » Author: icefoglights
I've tried it with an HPS before.  It was as exciting as screwing in a dead light bulb.  Without the 4kv pulse to strike the arc, nothing will happen.
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Mr. Big
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Re: What will happen? « Reply #5 on: May 16, 2008, 03:18:01 AM » Author: Mr. Big
I've tried it with an HPS before.  It was as exciting as screwing in a dead light bulb.  Without the 4kv pulse to strike the arc, nothing will happen.

BEWARE! Don't do that with the retrofit HPS lamps, as they have a slight chance of igniting on the mains!
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sparkie
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Re: What will happen? « Reply #6 on: May 16, 2008, 06:30:23 AM » Author: sparkie
Do it outside, at the end of the yard furthest from the house. Use a long extension cable with a fuse or breaker on it so that you don't overload the mains wiring. Wear googles and a dust mask, or else watch from inside behind a closed door.

Best to do it on July 4th when theres lots of fireworks going off - you don't want to end up with the police at your door because the neighbours think you are bomb-making!

PS: Don't forget to record it on camera and put the video on Youtube!
« Last Edit: May 16, 2008, 06:46:01 AM by sparkie » Logged
icefoglights
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Re: What will happen? « Reply #7 on: May 16, 2008, 07:32:37 AM » Author: icefoglights
Enclosed (non-vintage) fixture is a good idea too.  I used a tallpack with a blown ballast.
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FGS
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Re: What will happen? « Reply #8 on: May 16, 2008, 10:32:01 AM » Author: FGS
If using your camera for the video. It's a good idea to have something bulletproof between the lamp and camera. A 3/4" Plexiglass of 1'X1' size will be more than enough.
« Last Edit: May 16, 2008, 10:35:14 AM by FGS » Logged

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TudorWhiz
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Re: What will happen? « Reply #9 on: May 18, 2008, 01:32:07 PM » Author: TudorWhiz
Yes MV will either explode or the leads on the ends of the arctube will simply vaporize.

HPS will do nothing, but Retrofit HPS will have a major damage...

doing it on MH probably will be the worst of all..........

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GE M-400A1
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Re: What will happen? « Reply #10 on: May 20, 2008, 08:53:25 AM » Author: GE M-400A1
I will try it with a Metalarc Pro-Tech 70W then a 100 China Crap Mercury Vapor!

I will post pictures soon!
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Mr. Big
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Re: What will happen? « Reply #11 on: May 20, 2008, 09:14:03 AM » Author: Mr. Big
I will try it with a Metalarc Pro-Tech 70W then a 100 China Crap Mercury Vapor!

I will post pictures soon!

LOL you think that's bad, I've hooked fluorescent tubes up to the mains before, lets see, an F34 ALTO, which resulted in a purple flash at both ends, lamp surprisingly SURVIVED :o

Second was a Chinese F6T5 it did the same thing only the lamp lost vacuum in this case lol
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TudorWhiz
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Re: What will happen? « Reply #12 on: May 20, 2008, 11:14:14 AM » Author: TudorWhiz
I will rather see a video, not a picture.........
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sparkie
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Re: What will happen? « Reply #13 on: May 20, 2008, 04:21:02 PM » Author: sparkie
If you want some real firepower, try a self igniting HPS. The arc tube won't do anything but the glowbottle contacts closing will create an instantaneous hard short across the mains  :o
Hundreds of amps will flow in the milliseconds it takes for the fuse or breaker to trip, and this will be enough for a LOUD BANG!!

The contacts will vaporize instantly and the bottle/outer bulb will almost certainly shatter - but the arc tube will probably survive.
« Last Edit: May 20, 2008, 04:23:57 PM by sparkie » Logged
form109
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Re: What will happen? « Reply #14 on: March 16, 2009, 03:52:38 PM » Author: form109
i've had three regent MV lamps blown because of accidental contact with Mains Voltage...and the pattern i notice is that the lead wire to the lower main electrode(next to the starter electrode)is the one that always vaporizes..the consistency makes me think its a saftey feature designed to cut power to the arctube to prevent it from exploding,just a theroy.
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